According to TheWrap, Insidious Chapter 2 gave investors the biggest bang for their buck with a 31.1% return on their investment. The film's budget was $5 million and earned $160.4 million worldwide.

Universal's The Purge had the second best ROI (return on investment) with a worldwide gross of $89.3 million on a $3 million budget. In third place was The Conjuring, a $20 million horror film that had a global cume of $316.7 million.

As you can tell from TheWrap's graphic below, these three low-budget horror movies offered a better return on investments than even blockbusters such as Iron Man 3, Despicable Me 2, and The Hunger Games: Catching Fire.